Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Cornell finds deadly fish virus in the Northeast is spreading to other species

21.07.2006
Cornell researchers have found that a deadly fish virus detected in the northeastern United States for the first time in June in two species has probably spread to at least two more. But they have yet to determine whether the virus is responsible for the death of hundreds of fish in Lake Ontario and the St. Lawrence River in recent weeks.

Paul Bowser, Cornell professor of aquatic animal medicine, holds a muskellunge found dead in the northeastern waters. The fish is one of many undergoing tests at Cornell to detect a deadly viral hemorrhagic septicemia virus (VHSV) spreading in the Great Lakes.

Over the past month, Cornell's Aquatic Animal Health Program at the College of Veterinary Medicine has been sent some 300 fish for evaluation. The frozen samples are from the fish that have been dying since late May and early June in Lake Erie, Lake Ontario and the St. Lawrence River. Last week, an estimated 1,000 dead fish washed up on the shores of Lake Ontario in just one morning.

Viral hemorrhagic septicemia virus (VHSV) was detected and confirmed for the first time in the Northeast in round gobies and muskellunge in June. Cornell researchers are awaiting finals results of tests on 54 fish of 10 species that indicated VHSV in smallmouth bass and burbot. To date, Cornell researchers also have tested for the virus in lake sturgeon, brown bullhead, rock bass, yellow perch, pumpkinseed and black crappie.

VHSV causes fatal anemia and hemorrhaging in many fish species but poses no threat to humans or other animals.

"The situation right now is that we still have fish dying in Lake Ontario," said Geoffrey Groocock, a postdoctoral associate at Cornell's Aquatic Animal Health Program.

"We have detected the virus in other fish species in the region, which may be contributing to the continuing fish mortalities. We are continuing to test samples as we receive them from the New York State Department of Environmental Conservation (DEC) and State University of New York College of Environmental Science and Forestry Thousand Island Biological Field Station to try and get a clearer picture."

The researchers are using a classical cell culture technique to perform the initial stage of the diagnostic testing. This technique can take two to four weeks to yield results. Cornell researchers are developing a molecular-based test for VHSV based on a specific gene sequence in the virus. Once available, the new technique will cut the turnaround for confirmation to three to five days.

Groocock said the high number of dead fish reported recently may be due to the increased presence of vacationers on the lakes in summer, as well as the increased awareness since reports of mortalities earlier in the season. Also, recent storms and heavy winds may have washed up more fish from deeper waters. Groocock added that while more species of fish are dying, absolute numbers of fish mortalities do not appear to be changing.

"There is no cure for VHSV in fish in an ecosystem as large as the Great Lakes Basin. Given this, it is likely that management practices designed to limit the spread of the virus will be put in place," said Groocock.

Although no management decisions have yet been made, the DEC could recommend that boaters clean their boats before traveling from one body of water to another and not dump bait minnows into open water after a day of fishing.

VHSV was first reported in 1988 in the United States in spawning salmon in the Pacific Northwest. It was reported in North American freshwater fish in 2005 in muskellunge in Lake St. Claire, Mich., and in freshwater drum from the Bay of Quinte, Lake Ontario, Canada.

Sabina Lee | EurekAlert!
Further information:
http://www.cornell.edu

More articles from Ecology, The Environment and Conservation:

nachricht Successful calculation of human and natural influence on cloud formation
04.11.2016 | Goethe-Universität Frankfurt am Main

nachricht Invasive Insects Cost the World Billions Per Year
04.10.2016 | University of Adelaide

All articles from Ecology, The Environment and Conservation >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Novel silicon etching technique crafts 3-D gradient refractive index micro-optics

A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.

Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...

Im Focus: Quantum Particles Form Droplets

In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.

“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...

Im Focus: MADMAX: Max Planck Institute for Physics takes up axion research

The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.

The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...

Im Focus: Molecules change shape when wet

Broadband rotational spectroscopy unravels structural reshaping of isolated molecules in the gas phase to accommodate water

In two recent publications in the Journal of Chemical Physics and in the Journal of Physical Chemistry Letters, researchers around Melanie Schnell from the Max...

Im Focus: Fraunhofer ISE Develops Highly Compact, High Frequency DC/DC Converter for Aviation

The efficiency of power electronic systems is not solely dependent on electrical efficiency but also on weight, for example, in mobile systems. When the weight of relevant components and devices in airplanes, for instance, is reduced, fuel savings can be achieved and correspondingly greenhouse gas emissions decreased. New materials and components based on gallium nitride (GaN) can help to reduce weight and increase the efficiency. With these new materials, power electronic switches can be operated at higher switching frequency, resulting in higher power density and lower material costs.

Researchers at the Fraunhofer Institute for Solar Energy Systems ISE together with partners have investigated how these materials can be used to make power...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ICTM Conference 2017: Production technology for turbomachine manufacturing of the future

16.11.2016 | Event News

Innovation Day Laser Technology – Laser Additive Manufacturing

01.11.2016 | Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

 
Latest News

UTSA study describes new minimally invasive device to treat cancer and other illnesses

02.12.2016 | Medical Engineering

Plasma-zapping process could yield trans fat-free soybean oil product

02.12.2016 | Agricultural and Forestry Science

What do Netflix, Google and planetary systems have in common?

02.12.2016 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>